Magnesium air reserve battery has unique advantages

One of the key words in 2013 was high-tech, and the global capital market also kept rising speculation in technology stocks. High-tech also played an important role in the earthquake-stricken areas in Sichuan. According to relevant media reports, the “magnesium air reserve battery” developed by the Dalian Institute of Chemical Physics of the Chinese Academy of Sciences attracted widespread attention when it appeared in the Sichuan disaster area. Magnesium air reserve battery can meet a 10-watt LED lighting work for 30 days, or 200 smartphones are fully charged. Analysts pointed out that in view of the unique advantages of magnesium reserve batteries, its future popularity will be expected to drive the growth of magnesium metal demand.

Magnesium Air Reserve Battery Shows Hits in Earthquake Disaster Area

The lively Sichuan Lushan earthquake site was active with multiple disaster relief teams. In addition to the publicly known teams of soldiers, medical personnel, and volunteers, there are also several special teams, that is, scientific and technological relief teams. Among them, the contingent of emergency mobile power equipment consisting of magnesium air storage batteries has attracted much attention.

The items brought by scientists have almost become an essential part of the lives of the victims. There is a row of all black tents on Jiang Weilu in Lushan County. There is a traffic police support team from other cities and counties in Sichuan Province. The “charger” and “lighting lamp” that are in demand in the tents are loved by the military and the people.

According to reports, this 1.2-liter, about 1 kilogram "charger", scientific name is "magnesium air reserve battery", is the Chinese Academy of Sciences Dalian Institute of Chemical Physics, the national 973 chief scientist Sun Gongquan specifically brought for the disaster area. In Sun Gongquan's words, this little guy can meet a 10-watt LED light for 30 days, or charge 200 smart phones. This "magnesium air reserve battery" has a very high energy and the unit of energy density is 800 watt-hours per kilogram. The new battery of 1 kilogram is equivalent to 30 times that of lead-acid battery used in automobiles. Sun Gongquan introduced: "You don't need to charge, you can do it by adding some water to magnesium."

It should be pointed out that this sought-after "charger" has only just been out of the laboratory. The study of metal air reserve power led by Dalian Institute of Chemical Physics, Chinese Academy of Sciences, is mainly aimed at metal air batteries (including magnesium-air batteries, lithium-air batteries, zinc-air batteries, and aluminum-air batteries) through which key materials for batteries are passed. Innovative research on system integration and processing technology has focused on solving problems such as metal anode corrosion and passivation, air cathode stability, solid product management, and battery integration and processing technologies, thereby improving the performance and life of metal air batteries, and reducing the Its cost. At present, the specific energy of the prototype of the magnesium air reserve battery has reached 700Wh/kg, which has reached the international advanced level.

Analysts said that magnesium storage batteries have a shelf life of more than 10 years and can be added to clean water or seawater for temporary use on any occasion and can be used within half an hour after activation. Its operating voltage is very stable, and its service life is generally 0.5-24 hours. Magnesium batteries are mainly used for military communications and meteorological instruments, marine rescue equipment, and high-altitude radars.

Magnesium air reserve battery pack car is not a dream

In addition to its role in the earthquake-stricken area in Sichuan, magnesium air reserve batteries have also been used in electric vehicles. According to relevant media reports, the Korea Academy of Science and Technology has developed a technology that enables an electric car to drive under a full battery and travel distances of up to 800 kilometers, approximately from the Seoul to Busan.

At present, South Korean scientists completed the road test of the world's first magnesium-air battery car. According to related media reports, the Korea Academy of Science and Technology announced that it has successfully completed a magnesium-air battery-powered vehicle driving test. Dr. Cho Byung-won of the Energy Convergence Research Center of the hospital led the project. A magnesium-air battery is five times the energy of a lithium-ion battery of the same size, and its required charging time is shorter. If the power car of the magnesium-air battery system is compared with the conventional gasoline-powered car, driving at the same level, the electric car model has a greater energy density.

In fact, magnesium air batteries are known for their high energy density. However, magnesium anodes have a lower reaction efficiency and air cathodes have a slower response rate. This means that although magnesium-air fuel cells can store a lot of energy, the conversion of energy into actual power is still very limited. To solve this problem, the Korea Science and Technology Research Institute uses a variety of substances to change the chemical composition of magnesium anodes and air cathodes, and to increase the reaction efficiency and speed. In the end, the team’s magnesium air battery doubled compared to traditional batteries.

Not only that, the battery's charging time is only 10 minutes, just need to replace the magnesium plate and salt water electrolyte. However, in the medium term, it is too early for magnesium air batteries to be fully applicable to electric vehicles. There are still many difficulties to overcome before achieving commercialization. The biggest issue is cost. At present, the fuel cost of a magnesium air battery car model is three times that of a gasoline-powered car. Dr. Cho Byung-won said that although the current fuel cost is still high, once the battery technology and magnesium hydroxide recovery technology are developed, the subsequent cost will be expected to be significantly reduced, so the commercialization of magnesium air electric vehicles can still be realized.

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